package com.example.mapper;

import com.example.pojo.Dept;
import org.apache.ibatis.annotations.*;

import java.util.List;

//部门表
@Mapper
public interface DeptMapper {


    //查询所有部门信息
    @Select("select id, name, create_time, update_time from dept order by update_time desc;")
    List<Dept> findAll();

    //根据ID删除部门信息
    @Delete("delete from dept where id = #{id}")
    void deleteByID(Integer id);

    //根据ID新增部门信息
    @Insert("insert into dept(name,create_time,update_time) values(#{name} , #{createTime} , #{updateTime})")
    void insert(Dept dept);


    //查询部门信息
    @Select("select * from dept where id = #{id}")
    Dept getByID(Integer id);

    //修改部门信息
    @Update("update dept set name =#{name},update_time =#{updateTime} where id = #{id}")
    void update(Dept dept);

    // 根据部门ID统计员工数量
    @Select("SELECT COUNT(*) FROM emp WHERE dept_id = #{deptId}")
    int countEmpByDeptId(Integer deptId);
}
